CN212310619U - Forming die of part - Google Patents

Abstract

The utility model discloses a forming die of part, this forming die include first mould, second mould and third mould in proper order, first mould, second mould and third mould carry out local characteristic shaping, plastic back pressure and convex closure outer fringe shearing treatment to sheet metal's dark convex closure and shallow convex closure respectively. The utility model provides a forming die structure has solved the not good problem of plane degree such as product warpage and deformation, can effectively restrain shaping material's inhomogeneous flow and cut off the internal stress, guarantees that the finished product that production obtained has good plane degree.

Description

Forming die of part

Technical Field

The utility model belongs to the technical field of the technique of sheet metal punching press and specifically relates to a forming die of part is related to.

Background

Large-scale metal flat plate stamping parts are used for boxes, panels and back plates of 5G communication, new energy, household appliances and electronic products. Sheet metal stamping is typically sheet metal stamping and includes a plurality of local forming features which are not uniformly distributed and which provide a low overall sheet deformation during the forming process.

For large flat plate stamping parts with complex structures, due to the influence of uneven deformation, stress distribution after forming is uneven, and the problems of deformation and poor flatness exist in the stamping forming process of box parts, specifically, bulging, warping, springback and distortion, the product quality and assembly precision of the parts are seriously influenced by the defects of the products, and the product development and manufacturing period is prolonged.

Aiming at the problems of bulging, warping, resilience and distortion of parts stamped by the local characteristic thin plates, the general solution in the prior art is to optimally design an actual die and continuously modify, trial and error and adjust the die, so that a large amount of die testing time is needed, a machine table is occupied for a long time, and resource waste is caused.

Therefore, how to develop a set of dies for local forming of thin metal plate is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

In order to solve the above-mentioned problem that prior art exists, the utility model provides a forming die of part, it includes that the suit combines first mould, second mould and third mould together to carry out local characteristic shaping, plastic back pressure and convex closure outer fringe shearing treatment to sheet metal's dark convex closure and shallow convex closure in proper order, can effectively restrain forming material's inhomogeneous flow and cut off the internal stress, guarantee that the finished product that the production obtained has good plane degree.

In order to achieve the above object, the present invention provides the following technical solutions:

a forming die of a part sequentially comprises a first die, a second die and a third die;

the first die is a local characteristic forming die and comprises a first punch and a first lower die plate, and a first concave die plate and a first lower die pressing plate are arranged at the joint of the first punch and the first lower die plate respectively; the first concave template is sunken to form a first deep concave die and a first shallow concave die respectively, and first pressing ribs are arranged on the edges of the first deep concave die and the first shallow concave die; the first lower die pressing material plate protrudes upwards to form a first deep convex die and a first shallow convex die respectively, a first deep drawing rib and a second deep drawing rib are arranged on the outer sides of the first deep convex die and the first shallow convex die respectively, the first deep drawing rib is fixed on the first lower die pressing material plate, and the first deep drawing rib and the second deep drawing rib protrude out of the first lower die pressing material plate;

the second die is a shaping back-pressing die and comprises a second punch and a second lower die plate, and a second concave die plate and a second lower die pressure plate are respectively arranged at the joint of the second punch and the second lower die plate; the second concave template is sunken to form a second deep concave die and a second shallow concave die, and second pressing ribs are arranged at the edges of the second deep concave die and the second shallow concave die; the second lower die material pressing plate protrudes upwards to form a second deep convex die and a second shallow convex die respectively;

the third die is a convex hull outer edge shearing die and comprises a third punch and a third lower template, and a third concave template and a third lower die pressing plate are respectively arranged at the joint of the third punch and the third lower template; the third concave template is sunken to form a third deep concave die and a third shallow concave die; and the third lower die material pressing plate protrudes upwards to form a third deep convex die and a third shallow convex die respectively.

Among the above-mentioned forming die, first mould is local characteristic forming die, adopts first drift and first lower template to carry out the punching press to material (sheet metal), produces plastic deformation, carries out the blank pressing at this in-process to through the structure adjustment inside material's of optimizing the blank pressing flow, improve material internal stress distribution, and then play the inhibitory action to kick-backing. The first die is provided with the first drawing rib and the second drawing rib, so that the material can be effectively prevented from flowing into the female die, the stretching effect of the material is improved, and particularly, the compression stress acting areas of the parts are shifted to the tensile stress area at bending angle parts which are easy to rebound.

Meanwhile, in the first die, the edges of the first deep female die and the first shallow female die are provided with first pressing ribs, the propagation path of stress waves during local feature forming is cut off by arranging the pressing ribs around the local features, the influence of the local feature forming on the whole part is reduced, and therefore warping resilience of the whole part is reduced.

The second die is a shaping back pressure die, the convex hull can generate reverse deformation through back pressure (back pressure), and further generates compressive stress on the large plane part, so that the stress is redistributed on the original basis, a part of residual tensile stress distributed on the large plane around the original convex hull is counteracted, the uneven distribution condition of the residual stress is improved, and the warping rebound is reduced.

And the third mold is a convex hull outer edge shearing mold, and the deep convex hull and the shallow convex hull of the material are respectively subjected to semi-shearing treatment to eliminate stress and ensure flatness.

Further, in the first mold, the first deep female mold and the first shallow female mold are respectively provided with a first deep female mold stripper plate and a first shallow female mold stripper plate, and the first pressing rib is arranged on two sides of the first deep female mold stripper plate and the first shallow female mold stripper plate.

As the top of the convex hull needs the female die stripper plate for pressing, the first deep concave die stripper plate and the first shallow concave die stripper plate are adopted for pressing at the initial molding stage of the deep convex hull and the shallow convex hull, so as to prevent the top surfaces of the deep convex hull and the shallow convex hull from being drum-shaped after molding. Because the concave die plate is driven by the nitrogen spring, enough material pressing force can be ensured when the first deep concave die stripper plate and the first shallow concave die stripper plate press materials.

Further, in the first die, a first male die fixing plate is arranged below the first lower die material pressing plate, and the first deep male die and the first shallow male die are respectively and fixedly connected with the first male die fixing plate.

Further, the second deep drawing rib is arranged on the inner side of the first deep drawing rib, and the second deep drawing rib is fixedly connected to the first punch fixing plate.

The first deep drawing rib and the second deep drawing rib are respectively arranged at the outer sides of the first deep convex die and the first shallow convex die, and meanwhile, the second deep drawing rib is longer than the first deep drawing rib and is closer to the first deep convex die or the first shallow convex die; the first deep drawing rib is fixed on the first lower die pressure plate, the material can be pressed to inhibit the material from flowing in the initial molding stage, and the first deep drawing rib can be bent in four sides; the second deep drawing rib is fixed on the first male die fixing plate, and the material is extruded to form a reaction force with the stretching of the convex hull at the last stage of forming, so that the internal and external tensile stress is balanced, and the flatness of the product is ensured.

Further, the width of the first ribbing is set to be 1.5-2.0mm, and the depth is set to be 0.3-0.4T; and T is the thickness of the molding material.

The first pressing rib presses the material in the molding process to prevent the outer material from flowing inwards, and the plastic and elastic stress formed by the flowing material can be eliminated.

Further, in the second die, a second male die fixing plate is arranged below the second lower die material pressing plate, and the second deep male die and the second shallow male die are respectively and fixedly connected with the second male die fixing plate;

in the third die, a third male die fixing plate is arranged below the third lower die material pressing plate, and the third deep male die and the third shallow male die are respectively and fixedly connected with the third male die fixing plate.

On the basis of the die structure, the material is subjected to punch forming treatment by combining a part forming control method, and the method specifically comprises the following steps:

s1, using the first die to perform local feature forming on a material: respectively stretching a deep convex hull and a shallow convex hull on the material, and punching small grooves on two sides of the deep convex hull and the shallow convex hull by first pressing ribs; punching a first rib and a second rib by a first deep-drawing rib and a second deep-drawing rib on the outer side of the material;

s2, shaping and back-pressing the deep convex hull and the shallow convex hull by using the second die;

and S3, performing outer edge half-shearing on the deep convex hull and the shallow convex hull by using the third die.

The first die is used for stamping the material, local characteristic forming is carried out, plastic deformation is generated, edge pressing is carried out in the process, the flowing of the internal material is adjusted through the structure of the optimized edge pressing, the internal stress distribution of the material is improved, the suppression effect on resilience is further played, the stretching effect of the material is increased, and particularly, the bending angle part which is easy to rebound is generated, so that the compression stress action area of the parts is transferred to the tensile stress area.

In the process of shaping and back-pressing the product by the second die, the height of the convex hull is reduced to generate reverse deformation, the large plane part generates compressive stress, and a part of residual tensile stress distributed around the convex hull in the first process S1 is offset, so that the uneven distribution condition of the residual stress is improved, and the buckling rebound is reduced.

And the third die performs outer edge half-shearing on the convex hull of the product, mainly eliminates stress and ensures the flatness of the product.

As a further description of the above part molding control method, in S1, when the deep convex hull is drawn, the deep convex hull molding angle α 1 is 3 to 5 ° greater than the angle of the finished product, and the deep convex hull molding height H11 is 0.5 to 0.8T greater than the height of the finished product; the radius R11 of the deep convex hull forming concave die is the same as the forming radius of the corresponding part of the finished product; the radius R12 of the deep convex hull forming convex die is larger than the forming radius of the corresponding part of the finished product, and the value is 0.5-0.8T;

when the shallow convex hull is stretched, the forming height H12 of the shallow convex hull is 0.3T greater than the height of a finished product, the chamfer of the shallow convex hull male die takes 1T, and the chamfer of the shallow convex hull female die takes 0.5T.

As a further description of the above molding control method, in S2, when shaping the back-pressed deep convex hull, the deep convex hull shaping angle α 2 is 1-2 ° larger than the angle of the finished product, the deep convex hull shaping height H21 is the same as the height of the finished product, the deep convex hull shaping die radius R21 is smaller than the convex hull shaping die radius R11, and the deep convex hull shaping punch radius R22 is smaller than the deep convex hull molding punch radius R12;

when the back pressure shallow convex hull is shaped, the height H22 of the shallow convex hull is close to the upper limit value of the height of the finished product, the chamfer of the shallow convex hull convex die takes a value of 0.5T, and the chamfer of the shallow convex hull concave die takes a value of 0.5T.

As a further description of the above molding control method, in S3, at the time of half shearing the deep convex hull, the half shearing depth H31 of the deep convex hull is 1/4 to 1/3T; when the shallow convex hull is half-sheared, the half shearing depth H32 of the shallow convex hull is 1/5-1/3T.

In the processes of local feature forming, shaping back pressure and convex hull outer edge semi-shearing, parameters of a forming angle, a forming height, a shaping height, a semi-shearing depth and other stamping processes are optimized and controlled, and by inhibiting material flowing and cutting off internal stress, a product with a target qualified size can be produced by stamping, so that the product is guaranteed to have good flatness.

(1) The utility model provides a forming die of part, including the first mould, second mould and the third mould that the suit combines together, it carries out local characteristic shaping, plastic back pressure and convex closure outer fringe shearing treatment to sheet metal's dark convex closure and shallow convex closure in proper order, can effectively restrain forming material's inhomogeneous flow and cut off the internal stress, guarantees that the finished product that the production obtained has good plane degree to the distortion that the shaping of sheet metal caused because of local characteristic has been solved, plane degree is bad and the deformation scheduling problem.

(2) The utility model discloses a forming die can combine together with shaping control method, optimizes and controls through the parameter to stamping processes such as shaping angle, shaping height, plastic height and half-cut degree of depth, can produce the qualified product that accords with the target size high-efficiently, need not the flattening and the orthopedic process of extra increase, and it has saved the time of examination mould time and board debugging.

Drawings

Fig. 1 is a schematic plan view of a forming mold for a part according to the present invention.

Fig. 2 is a schematic plan view of a first mold in the forming mold of the present invention.

Fig. 3 is a process flow chart of a molding control method corresponding to the molding die of the present invention.

Fig. 4 is a schematic structural diagram of the finished product after being processed by the local feature forming process of the present invention.

Fig. 5 is a schematic diagram of the structure of the finished product after being processed by the shaping back pressure process of the present invention.

Fig. 6 is a schematic structural diagram of the finished product after being processed by the outer edge shearing process of the present invention.

Detailed Description

To facilitate an understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings and specific examples. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1

Fig. 1 is a schematic plan view showing a forming mold of a part of this embodiment, fig. 2 is a schematic plan view showing a structure of a first mold of this embodiment, and referring to fig. 1 and fig. 2 in combination, a forming mold of a part includes a first mold 1, a second mold 2 and a third mold 3 in sequence, wherein the first mold 1, the second mold 2 and the third mold 3 are combined together in a set, and a material is subjected to a local feature forming, a shaping back-pressing and a convex outer edge shearing treatment, respectively, the material described in this embodiment is a metal plate material, which may be a hot-rolled steel plate, a cold-rolled steel plate, a galvanized steel plate, a PCM plate material, an aluminum alloy plate material and stainless steel, that is, the forming mold of this embodiment can perform a punching process on the above plate material, as shown in fig. 1 and fig. 2, the first mold 1 is a local feature forming mold, which includes a first punch 11 disposed above and a first lower mold 12 disposed below, the first punch 11 and the first lower die plate 12 are respectively provided with a first concave die plate 111 and a first lower die pressing material plate 121 at the joint of the first punch 11 and the first lower die plate; the first cavity plate 111 is recessed from bottom to top to form a first deep cavity die 112 and a first shallow cavity die 113 respectively, and first press ribs 114 are arranged on the edges of the first deep cavity die 112 and the first shallow cavity die 113, that is, the first press ribs 114 are arranged not only on the edge of the first deep cavity die 112 but also on the edge of the first shallow cavity die 113; in addition, in this embodiment, the first beads 114 are disposed on the edges of the two sides of the first deep concave die 112 and the first shallow concave die 113, the first beads 114 protrude from the first concave die plate 111, the width of the first beads is set to 1.5-2.0mm, the depth of the first beads is set to 0.3-0.4T, and T is the thickness of the molding material. The first beads 114 are mainly used for pressing the material in the molding process to prevent the outer material from flowing inwards, and the plastic and elastic stress caused by the flowing material can be eliminated.

The top of the punched convex hull needs to be pressed by a female die stripper plate, so in the first punch 11 of the first die 1, the first deep female die 112 and the first shallow female die 113 are further provided with a first deep female die stripper plate 115 and a first shallow female die stripper plate 116, respectively, and the first deep female die stripper plate 115 and the first shallow female die stripper plate 116 are used for pressing at the initial molding stage of the deep convex hull and the shallow convex hull to prevent the top surfaces of the deep convex hull and the shallow convex hull from being drum-shaped after molding. Because the concave die plate is driven by the nitrogen spring, enough material pressing force can be ensured when the first deep concave die stripper plate and the first shallow concave die stripper plate press materials. Note that the first beads 144 are provided on both sides of the first deep-cavity die stripper plate 115 and the first shallow-cavity die stripper plate 116.

Now, describing the structure of the first lower mold plate of the first mold, the first lower mold material plate 121 is protruded upward to form a first deep male mold 122 and a first shallow male mold 123, respectively, and the first deep male mold 122 and the first shallow male mold 123 are respectively cooperated with the first deep female mold 112 and the first shallow female mold 113 to press-mold the deep male closure and the shallow male closure. The first deep punch 122 and the first shallow punch 123 are provided with a first deep bead 124 and a second deep bead 125 on the outer side, and the second deep bead 125 is located on the inner side of the first deep bead 124, that is, the second deep bead 125 is closer to the first deep punch 122 and the first shallow punch 123 than the first deep bead 124.

A first punch retainer 126 is further disposed below the first lower die pressing plate 121, and the first deep punch 122 and the first shallow punch 123 of the first lower die pressing plate 121 are respectively and fixedly connected to the first punch retainer 126. The first deep-drawing rib 124 and the second deep-drawing rib 125 both protrude from the first lower die pressing material plate 121, and when the material is punched, the first rib and the second rib can be punched.

In the connection relation, the first deep-drawing rib 124 is fixed on the first lower die pressing plate 121, the material can be pressed to inhibit the material from flowing in the initial molding stage, and the first deep-drawing rib 124 can adopt a four-side bending mode; the second deep-drawing rib 125 is fixed on the first punch holder 126, and begins to extrude the material to form a reaction force with the convex hull stretching at the final stage of molding, so as to balance the internal and external tensile stress, thereby ensuring the product flatness.

Returning to fig. 1, in the forming die of the present embodiment, the second die 2 is a shaping back-pressing die, and includes a second punch 21 and a second lower die plate 22, and a second cavity plate 211 and a second lower die pressure plate 221 are respectively disposed at a junction of the second punch 21 and the second lower die plate 22; the second concave die plate 211 is recessed to form a second deep concave die 212 and a second shallow concave die 213, and second beads 214 are arranged at the edges of the second deep concave die 212 and the second shallow concave die 213; the second lower die blank 221 is projected upward to form a second deep punch 222 and a second shallow punch 223, respectively.

The second die 2 can make the convex hull generate reverse deformation through back pressure (back pressure), and further generate compressive stress on the large plane part, so that the stress is redistributed on the original basis, a part of residual tensile stress distributed on the large plane around the original convex hull is counteracted, the uneven distribution condition of the residual stress is improved, and the warpage rebound is reduced.

The third die 3 is a convex hull outer edge shearing die and comprises a third punch 31 and a third lower die plate 32, wherein a third concave die plate 311 and a third lower die pressure plate 321 are respectively arranged at the joint of the third punch 31 and the third lower die plate 32; the third cavity plate 311 is sunken to form a third deep cavity die 312 and a third shallow cavity die 313; the third lower die blank 321 protrudes upward to form a third deep punch 322 and a third shallow punch 323, respectively.

The third die 3 respectively carries out half-shearing treatment on the shaped and back-pressed material, namely, the deep convex hull and the shallow convex hull, so as to eliminate stress and ensure flatness.

In the above second and third molds 2 and 3, the second punch retainer 224 and the third punch retainer 324 are provided below the second lower die blank 221 and the third lower die blank 321, respectively. In the second die 2, the second deep male die 222 and the second shallow male die 223 are fixedly connected with the second male die holder 224 respectively; in the third die 3, the third deep punch 322 and the third shallow punch 323 are fixedly connected to the third punch retainer 324, respectively.

According to the forming die for the part, the first die, the second die and the third die sequentially carry out local feature forming, shaping back pressure and convex hull outer edge shearing treatment on the deep convex hull and the shallow convex hull of the metal plate, uneven flowing and cutting-off internal stress of a forming material can be effectively inhibited, and the finished product obtained through production is guaranteed to have good flatness, so that the problems of distortion, poor flatness, deformation and the like caused by forming of local features of sheet metal are solved.

Example 2

Fig. 3 is a process flow diagram of a forming control method corresponding to a forming mold in the present embodiment, and based on the structure of the forming mold for a part in embodiment 1, as shown in fig. 3, the present embodiment provides a forming control method for a part, which performs a press forming process on a material by using the above mold, and specifically includes the following steps:

s1, local feature forming is carried out on the material by using a first die 1: respectively stretching a forming deep convex hull 41 and a forming shallow convex hull 42 from a material, and punching small grooves 43 on two sides of the forming deep convex hull 41 and the forming shallow convex hull 42 by first pressing ribs 114; punching a first rib 44 and a second rib 45 on the outer side of the material by using a first deep-drawing rib 124 and a second deep-drawing rib 125 to obtain a first process product 4;

s2, shaping and back-pressing the shaping deep convex hull 51 and the shaping shallow convex hull 52 by using a second die 2 to obtain a second procedure product 5;

and S3, performing outer edge half-shearing on the half-sheared deep convex hull 61 and the half-sheared shallow convex hull 62 by using the third die 3 to obtain a third-process product 6.

Fig. 4 is a schematic structural diagram of a finished product after being processed by a local feature forming process in the present embodiment, and with reference to fig. 3 and 4, in S1, when the first mold 1 stretches the S1 deep convex hull 41, the forming angle α 1 of the S1 deep convex hull is 3 to 5 degrees greater than the angle of the finished product (target product), the forming height H11 of the S1 deep convex hull is 0.5 to 0.8T greater than the height of the finished product, and T is the thickness of the material (S1 material); the radius R11 of the forming concave die of the S1 deep convex hull 41 is the same as the radius of S1 of the corresponding part of the finished product; s1 the radius R12 of the forming convex mould of the deep convex hull 41 is larger than the forming radius of the corresponding part of the finished product, and the value is 0.5-0.8T;

when the S1 shallow convex hull 42 is stretched, the molding height H12 of the S1 shallow convex hull 42 is 0.3T greater than the height of a finished product, the chamfer value of the punch for molding the S1 shallow convex hull 42 is 1T, and the chamfer value of the die for molding the S1 shallow convex hull 42 is 0.5T.

The first beads 114 press the material in the molding to prevent the outer material from flowing inwardly, relieve the plastic and elastic stress caused by the material flowing, and punch the small grooves 43 of S1. In this embodiment, small S1 grooves 43 are punched on both sides of the S1 deep convex hull 41 and the S1 shallow convex hull.

The first die 1 is used for stamping a material, local characteristic forming is carried out, plastic deformation is generated, edge pressing is carried out in the process, the flowing of the internal material is adjusted through the structure of the optimized edge pressing, the internal stress distribution of the material is improved, the suppression effect on resilience is further played, the stretching effect of the material is increased, and particularly, the bending angle part which is easy to rebound is generated, so that the compression stress action area of the parts is transferred to the tensile stress area.

Fig. 5 shows a schematic structural diagram of a finished product after being processed by the shaping and back-pressing process in this embodiment, and with reference to fig. 3 and 5, in S2, when shaping and back-pressing the S2 deep convex hull 51, the shaping angle α 2 of the S2 deep convex hull 51 is 1-2 ° greater than the angle of the finished product, and the shaping height H21 of the S2 deep convex hull 51 is the same as the height of the finished product and can be set as the upper limit of the size of the finished product; the radius R21 of the shaping concave die of the S2 deep convex hull 51 is the radius of the finished concave die and is smaller than the radius R11 of the forming concave die of the S1 deep convex hull 41; the radius R22 of the shaping punch of the S2 deep convex hull 51 is smaller than the radius R12 of the forming punch of the S1 deep convex hull 41;

when the shaping back pressure S2 shallow convex hull 52 is formed, the height H22 of the S2 shallow convex hull 52 is close to the upper limit value of the height of the finished product, that is, the upper limit value of the height of the finished product is set, the chamfer of the male die of the S2 shallow convex hull 52 takes 0.5T, and the chamfer of the female die of the shallow convex hull takes 0.5T.

In the step S2, the second beads 214 reshape the return pressure to obtain the small grooves 53 of S2, mainly to prevent the return pressure from being transmitted to the surrounding material to cause poor flatness.

In the process of shaping and back-pressing the product by the second die, the heights of the deep convex hull and the shallow convex hull are reduced to generate deformation in opposite directions, the large plane part is subjected to compressive stress, and a part of residual tensile stress distributed around the convex hull in the first process S1 is offset, so that the condition of uneven distribution of the residual stress is improved, and the warpage rebound is reduced.

Fig. 6 is a schematic structural diagram of a finished product after being subjected to an outer edge shearing process in the embodiment, and referring to fig. 3 and 6 in combination, in S3, when the deep convex hull 61 is half sheared through S3, the half shearing depth H31 of the deep convex hull 61 of S3 is 1/4 to 1/3T, the die blanking gap is set to be a normal blanking gap, and the gap value is 1.1 to 1.3T; when the shallow convex hull 62 is half cut by the S3, the half cut depth H32 of the shallow convex hull 62 of the S3 is 1/5-1/3T, the blanking gap is set as the normal blanking gap, and the gap value is 1.1-1.3T.

The third die 3 performs outer edge half-shearing on the convex hull of the product, mainly eliminates stress and ensures the flatness of the product.

The part forming control method is combined with the forming die, parameters of the stamping process such as a forming angle, a forming height, a reshaping height and a half-shearing depth are optimized and controlled, qualified products meeting the target size can be efficiently produced, additional leveling and reshaping processes are not needed, and the die testing time and the machine debugging time are saved.

The part forming control method starts from the aspects of rib pressing, material flowing, plastic deformation, elastic deformation, die clearance, process compensation, the radius of a female die and the radius of a male die in the stretching process and the like, provides a method applied to thin metal plate forming, and through the combination of the method and the die, the die does not need to be repeatedly modified, so that the time for debugging a machine table and the die is saved, the input amount of die testing materials is also reduced, the production cost is saved, and the working efficiency of metal plate stamping is improved.

The foregoing is merely illustrative and explanatory of the structure of the present invention, which is described in more detail and with greater particularity, and is not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, many variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.

Claims (6)

1. The forming die of the part is characterized by comprising a first die (1), a second die (2) and a third die (3) in sequence;

the first die (1) is a local feature forming die and comprises a first punch (11) and a first lower die plate (12), wherein a first concave die plate (111) and a first lower die pressing plate (121) are respectively arranged at the joint of the first punch (11) and the first lower die plate (12); the first concave template (111) is sunken to form a first deep concave die (112) and a first shallow concave die (113) respectively, and first pressing ribs (114) are arranged on the edges of the first deep concave die (112) and the first shallow concave die (113); the first lower die pressing plate (121) protrudes upwards to form a first deep male die (122) and a first shallow male die (123), a first deep drawing rib (124) and a second deep drawing rib (125) are arranged on the outer sides of the first deep male die (122) and the first shallow male die (123), the first deep drawing rib (124) is fixed on the first lower die pressing plate (121), and the first deep drawing rib (124) and the second deep drawing rib (125) protrude out of the first lower die pressing plate (121);

the second die (2) is a shaping back-pressing die and comprises a second punch head (21) and a second lower die plate (22), and a second concave die plate (211) and a second lower die pressing plate (221) are respectively arranged at the joint of the second punch head (21) and the second lower die plate (22); the second concave die plate (211) is sunken to form a second deep concave die (212) and a second shallow concave die (213), and second pressing ribs (214) are arranged on the edges of the second deep concave die (212) and the second shallow concave die (213); the second lower die pressing plate (221) protrudes upwards to form a second deep convex die (222) and a second shallow convex die (223) respectively;

the third die (3) is a convex hull outer edge shearing die and comprises a third punch head (31) and a third lower die plate (32), and a third concave die plate (311) and a third lower die pressing plate (321) are respectively arranged at the joint of the third punch head (31) and the third lower die plate (32); the third concave mould plate (311) is sunken to form a third deep concave mould (312) and a third shallow concave mould (313); the third lower die pressing plate (321) protrudes upwards to form a third deep convex die (322) and a third shallow convex die (323).

2. The forming die according to claim 1, characterized in that in the first die (1), the first deep concave die (112) and the first shallow concave die (113) are provided with a first deep concave die stripper plate (115) and a first shallow concave die stripper plate (116), respectively, and the first beads (114) are provided on both sides of the first deep concave die stripper plate (115) and the first shallow concave die stripper plate (116).

3. The forming die according to claim 1, characterized in that in the first die (1), a first punch holder (126) is provided below the first lower die blank (121), and the first deep punch (122) and the first shallow punch (123) are respectively fixedly connected with the first punch holder (126).

4. The forming die according to claim 3, characterized in that the second draw bar (125) is arranged inside the first draw bar (124), and the second draw bar (125) is fixedly connected to the first punch holder (126).

5. The forming die according to claim 1, wherein the first bead (114) is set to have a width of 1.5-2.0mm and a depth of 0.3-0.4T; and T is the thickness of the molding material.

6. The forming die according to claim 1, characterized in that in the second die (2), a second punch retainer (224) is arranged below the second lower die material pressing plate (221), and the second deep punch (222) and the second shallow punch (223) are fixedly connected with the second punch retainer (224), respectively;

in the third die (3), a third punch retainer (324) is arranged below the third lower die pressure plate (321), and the third deep punch (322) and the third shallow punch (323) are respectively and fixedly connected with the third punch retainer (324).

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